{Reference Type}: Journal Article
{Title}: Enhanced red luminescence from GdAl3(BO3)4: Pr3+ phosphors under NUV excitation.
{Author}: Jamalaiah BC;Khan PS;Madhu N;
{Journal}: Luminescence
{Volume}: 39
{Issue}: 8
{Year}: 2024 Aug
{Factor}: 2.613
{DOI}: 10.1002/bio.4864
{Abstract}: The GdAl3(BO3)4:xPr3+ (0 ≤ x ≤ 5.0 mol%) phosphors were prepared through solid state reaction route and characterized for various lighting applications. Powder X-ray diffraction investigations revel rhombohedral structure matched to JCPDS card no. 83-1907. The morphological studies confirm the agglomeration of particles with different size and shape. The emission spectra show various emission transitions originating from Pr3+:(3P1,0, 1D2) emission states to their lower lying energy states upon 274 nm NUV excitation with a red shift for x > 0.5 mol%. The colour perception analysis results an intense red luminescence due to efficient energy transfer from Gd3+ to Pr3+ ions. The temperature-dependent luminescence investigations show good thermal stability even beyond 150°C with an activation energy of 0.24 eV. The observed experimental results show the potentiality of GdAl3(BO3)4:0.5 Pr3+ phosphor for red emitting devices and red component in phosphor converted white LEDs.